Model HT-SHK002ECBL, non-USB. Black with red trim, Also comes in white and red and blue and orange. Reputed to be more rugged that usual. Not certified for use with Dragon Naturally Speaking. Headphones: 20 — 20,000 Hz. Microphone: 100 — 10,000 Hz. Very good for the price. Noise canceling microphone. Amazon sells it under four different ASINs and four different prices. Oddly, the more expensive TT-HT-SHO001EC has less impressive specs. Specs.